code: def pydot_layout(G, prog="neato", root=None):
      """Create node positions using :mod:`pydot` and Graphviz.
  
      Parameters
      ----------
      G : Graph
          NetworkX graph to be laid out.
      prog : string  (default: 'neato')
          Name of the GraphViz command to use for layout.
          Options depend on GraphViz version but may include:
          'dot', 'twopi', 'fdp', 'sfdp', 'circo'
      root : Node from G or None (default: None)
          The node of G from which to start some layout algorithms.
  
      Returns
      -------
      dict
          Dictionary of positions keyed by node.
  
      Examples
      --------
      >>> G = nx.complete_graph(4)
      >>> pos = nx.nx_pydot.pydot_layout(G)
      >>> pos = nx.nx_pydot.pydot_layout(G, prog="dot")
  
      Notes
      -----
      If you use complex node objects, they may have the same string
      representation and GraphViz could treat them as the same node.
      The layout may assign both nodes a single location. See Issue #1568
      If this occurs in your case, consider relabeling the nodes just
      for the layout computation using something similar to::
  
          H = nx.convert_node_labels_to_integers(G, label_attribute='node_label')
          H_layout = nx.nx_pydot.pydot_layout(G, prog='dot')
          G_layout = {H.nodes[n]['node_label']: p for n, p in H_layout.items()}
  
      """
      import pydot
  
      P = to_pydot(G)
      if root is not None:
          P.set("root", str(root))
  
      # List of low-level bytes comprising a string in the dot language converted
      # from the passed graph with the passed external GraphViz command.
      D_bytes = P.create_dot(prog=prog)
  
      # Unique string decoded from these bytes with the preferred locale encoding
      D = str(D_bytes, encoding=getpreferredencoding())
  
      if D == "":  # no data returned
          print(f"Graphviz layout with {prog} failed")
          print()
          print("To debug what happened try:")
          print("P = nx.nx_pydot.to_pydot(G)")
          print('P.write_dot("file.dot")')
          print(f"And then run {prog} on file.dot")
          return
  
      # List of one or more "pydot.Dot" instances deserialized from this string.
      Q_list = pydot.graph_from_dot_data(D)
      assert len(Q_list) == 1
  
      # The first and only such instance, as guaranteed by the above assertion.
      Q = Q_list[0]
  
      node_pos = {}
      for n in G.nodes():
          str_n = str(n)
          # Explicitly catch nodes with ":" in node names or nodedata.
          if _check_colon_quotes(str_n):
              raise ValueError(
                  f'Node names and node attributes should not contain ":" unless they are quoted with "".\
                  For example the string \'attribute:data1\' should be written as \'"attribute:data1"\'.\
                  Please refer https://github.com/pydot/pydot/issues/258'
              )
          pydot_node = pydot.Node(str_n).get_name()
          node = Q.get_node(pydot_node)
  
          if isinstance(node, list):
              node = node[0]
          pos = node.get_pos()[
              1:-1
          ]  # strip leading and trailing double quotes
          if pos is not None:
              xx, yy = pos.split(",")
              node_pos[n] = (float(xx), float(yy))
      return node_pos
  
file_path: networkx/networkx/drawing/nx_pydot.py
imports: from locale import getpreferredencoding
  import networkx
  from networkx.utils import open_file
label_desc: Use image node_id 7 for calling a global function with example usage: pydot_layout(G, prog, root) and returns: node_pos